Casement window ventilator



Dec. 5, 1939. J. c BANCROFT r 2,182,576

CASEMENT WINDOW VENTILATOR Filed Dec. 31, 19 38 INVENTOR. .lwqplz 6! flancrafl;

Patented Dec. 5, 1939 Ui'iED ear 'FFIQE 3 Claims.

The invention herein disclosed relates to ventilators for casement windows.

Special objects of the invention are to provide a ventilator unit which will be readily applicable to existing casement windows, without appreciably adding to the bulk of or in any way interfering with the normal use of such windows and which while regulatable to pass the air desired for ventilation, will exclude rain, sleet and snow and will be self-draining so as to carry off any moisture of condensation or the like.

Further objects of the invention are to provide a unit having the characteristics mentioned, which will be particularly simple and inexpensive in design and construction, strong and durable, easy to install and requiring no special fastenings and which, in position in the window, will be neat and inconspicuous, so as not to be in any way objectionable from the aesthetic standpoint.

The foregoing objects are attained by the novel features of construction, combinations and relations of parts hereinafter defined and broadly claimed and illustrated in the accompanying drawing.

Fig. 1 in the drawing is an inside face view of a typical casement window having the invention incorporated therein.

Fig. 2 is an enlarged broken vertical sectional view through one of the ventilators, as on line 22 of Fig. 1.

Fig. 3 is a horizontal sectional View as on line 3-3 of Fig. 2.

Fig. 4 is a further enlarged vertical sectional view on subtsantially the plane of line 4-4 of Fig. 2.

In Fig. 1, a casement window of typical design is illustrated involving companion swinging sash frames 5, with muntins 6, and glazing 1.

The ventilators are in the form of small boxlike units, indicated at 8, set in the bottom of the sash frames, below the glazing in such frames.

Figs. 2 and 3 show that the box-like frame or casing of each unit is of approximately the depth or thickness of the sash frame and of a length approximating that of the width of the frame, so as to seat on the bottom bar of the frame, Fig. 2, and to fill in the space between the two sides of the frame, Fig. 3. To so position and secure the box unit in this relation, it is made with a longitudinal grooveway 9, along the bottom and at the inner face of the unit, Fig. 2, to fit over the upright flange H! of the bottom Z a bar of the sash frame and it is formed with two vertical grooveways at M, Fig. 3, in the opposite ends of the same to fitover the laterally extending flanges E2, of the side bars of the frame. 7

The top of the casing as shown particularly in Fig. 2, has a horizontal portion l3, and at the back or inner side of that a vertical flange l4,

cooperating to form a seat or step for the glass, similar to that ordinarily afforded by the horizontal portion and back flange H! of the lower frame bar. Thus the unit can be located and secured in the lower end of the sash frame and be utilized as a support for the glazing above it.

In the present disclosure, the ventilator casing is made up simply of two parts, a front or outside wall part i5, having rearwardly bent top and bottom wails and a back wall [6, welded or otherwise suitably secured to therearwardly extending portions of the front wall. The front wall has an air inlet opening ll, screened at 18, and covered bya rain excluding louvre is. The back or inside wall has an air outlet opening 20, controllable by a damper or cover plate 2 I. The latter is shown as hinged at the bottom by having a continuously extending flange 22, rockingly engaged over the lower edge of the opening 20, in the inside wall.

As shown in Fig. 4, this hinge flange is extended at the ends at 23, beneath the overstanding stationary lugs E i, on the inner face of the front wall to prevent this door or cover from being removed.

In addition to forming a hinge support for the control damper, the flange 22, by reason of its continuity, may act as a drain to pass moisture of condensationwhich may drip down from the inner face of the glass, outward into the bottom of the casing, from whence it may escape from one or more weep poles 25, Fig. 2-.

The inward swinging or opening movement of the air door is limited in the present disclosure by an inwardly angled dependent flange 25, at the low-er edge of the door, which as indicated in Fig. 2, comes into abutment with the inside face of the casing, in the desired full open position.

The groove 9 is shown formed by bending up the bottom portion of the casing at 21, Fig. 2,

in spaced parallel relation with the lower portion of the inner wall H5. The slots H. are shown formed by notching the ends of the top wall portion 53, in spaced relationship to the inside wall it, Fig.3. The outer wall 15, of the casing is shown as having the ends of the same bent backwardly to form the end walls 28. The casing thus has ample outer surfaces for the putty,

or other material necessary for fully sealing it in the sash frame. Also, this structure is fully strong enough to properly support the glass.

A suitable latch or look is usually provided for securing the ventilating door in closed position. In the present illustration, a simple form of turn latch is indicated at 29, in Figs. 2 and 4, on the door engageable with the inner face of the wall l6 above the opening 20 therein. An abutment 30 is shown in Fig. 4, for limiting the movement of the turn button.

The ventilator constructed as illustrated is relatively simple and inexpensive and while light in weight is strong and durable. The unit is easily installed by engaging the notched ends over the side flanges of the sash and then forcing it firmly down over the upright inner flange of the lower frame bar. The unit is sealed in this position by putty and the glass is sealed into position over the Ventilator unit, thus securing the latter in the frame and without extra fastenings of any kind. These ventilator units do 7 not project from the sash frame and do not interfere in any way with the ordinary usage of casement windows. Further, they are neat and inconspicuous and becoming a permanent part of the window, are ready for use at any time. While not ordinarily considered necessary, the air doors may have felt or other suitable sealing material about the edges of the same to prevent inward leakage of air. Thesedoors when open for ventilating purposes, act as inclined baffles directing the incoming air in an upward direction. The louvre and screen at the inlet side of the unit keep out rain, snow or the like, and the door, with its continuous hinge flange serves as a deflector to direct any water of condensation, which might run down over the inside of the glass, outwardly through the ventilator. The notches in the ends of the ventilator casing are preferably made deep enough and wide enough to enable the ventilator to fit different sizes of window sash and further to permit the fitting and engagement of the unit in the sash frame by hand, Without requiring the use of any tools or special equipment.

What is claimed is:

1. A ventilator for mounting in a swinging casement sash frame of the usual 2 bar crosssection with inwardly projecting flanges at the inner face of the frame, said ventilator being of unitary construction and insertable as a single unit in such a sash frame, said ventilator comprising a box casing of substantially the depth of such Z bar sash frame, said casing including inside and outside walls, top and bottom walls connecting said inside and outside walls in spaced relation, said bottom wall being longitudinally recessed adjacent said inside wall to fit over the inside upstanding flange of the bottom bar of the sash frame, said top Wall having a seat and a flange at the back of the same for glazing of the window, said top wall being notched inward- 1y from the ends of the same adjacent said inside wall to receive the inwardly projecting inside flanges of the side bars of the sash frame and the inside wall having portions engageable over the inner faces of said inside flanges, whereby said casing may be mounted by simply engaging the same over said bottom and side flanges of a casement sash frame and be thereby secured in position to seat and support the glazing in said frame, said inside and outside walls of the casing having openings therethrough providing a ventilating passage, screening across said ventilating passage, a downwardly extending rain excluding louvre over said opening in the outer wall and a regulatable closure for the opening in said inside wall of the casing.

2. A ventilator for mounting in a swinging casement sash frame of the usual 2 bar crosssection with inwardly projecting flanges at the inner face of the frame, said ventilator being of unitary construction and insertable as a single unit in such a sash frame, said ventilator comprising a box casing of substantially the depth of such 2 bar sash frame, said casing including inside and outside walls, top and bottom walls connecting said inside and outside walls in spaced relation, said bottom wall being longitudinally recessed adjacent said inside wall to fit over the inside upstanding flange of the bottom bar of the sash frame, said top wall having a seat and a flange at the back of the same for glazing of the window, said top wall being notched inwardly from the ends of the same adjacent said inside wall to receive the inwardly projecting inside flanges of the side bars of the sash frame and the inside wall having portions engageable over the inner faces of said inside flanges, whereby said casing may be mounted by simply engaging the same over said bottom and side flanges of a casement sash frame and be thereby secured in position to seat and support the glazing in said frame, said inside and'outside walls of the casing having openings therethrough providing a ventilating passage, screening across said ventilating passage, a downwardly extending rain excluding louvre over said opening in the outer wall and a regulatable closure for the opening in said inside wall of the casing, said casing having an opening to drain collected moisture to the outside of the casing.

3. A ventilator for mounting in a swinging casement sash frame of the usual 2 bar crosssection with inwardly projecting flanges at the inner face of the frame, said ventilator being of unitary construction and insertable as a single unit in such a window frame, said ventilator having notches in the upper and opposite end portions of the same to engage over the inwardly projecting inside flanges on the side .bars of a sash frame and recessed in the inside bottom portion of the same to engage over the inside flange of the bottom bar of a sash frame and whereby said ventilator may be securely held both at the top and at the bottom by engagement over said inside flanges of a casement sash frame, said ventilator having a glazing seat on the top of the same, said ventilator having a ventilating passage therethrough, screening across said ventilating passage, a rain excluding louvre extending from the upper portion of said ventilator downwardly over said ventilating passage and a damper at the inner end of said ventilating passage, said damper being pivoted at its lower edge to swing inwardly at its upper edge and catch means for securing said inwardly swinging damper in closed positon.

JOSEPH C. BANCROFT. 

